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OpenStudy (anonymous):
A person has 20 coins, all nickels and dimes, worth one dollar and 40 cents. How many nickels are there? If n = number of nickels and d = number of dimes, which system of equations represents the problem? A. 3t + 5s = 60 and 2t + 3s = 39 B. 3s + 5t = 60 and 2s + 3t = 39 C. s + t = 60 and 5s + 8t = 99
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